Asymmetric encryption and symmetric encryption are different in the encryption and decryption process, encryption and decryption speed, and transmission security. The details are as follows:

1. Encryption and decryption process Different

The same key is used in the symmetric encryption process and the decryption process. The encryption process is equivalent to using the original text key to transmit the ciphertext, while the decryption process uses the ciphertext-key to deduce the original text. However, asymmetric encryption uses two keys. Generally, the public key is used for encryption and the private key is used for decryption.

2. Encryption and decryption speeds are different

Symmetric encryption and decryption are faster and suitable for long-term data use. Asymmetric encryption and decryption take a long time, are relatively slow, and are only suitable for use with small amounts of data.

3. The security of transmission is different

During the process of symmetric encryption, it is impossible to ensure that the key is transmitted safely. The ciphertext may be intercepted by a third party during the transmission process. If the password If the password is also intercepted by a third party, the transmitted password information will be cracked by the third party, and the security is relatively low.

In the asymmetric encryption algorithm, the private key generates different random numbers based on different algorithms. The private key derives the public key through a certain encryption algorithm, but the derivation process from the private key to the public key is one-way. , which means that the public key cannot be deduced from the private key. So the security is higher.

Baidu Encyclopedia-Symmetric Encryption

Baidu Encyclopedia-Asymmetric Encryption